What’s Vulnerable › Vulnerabilities
CVE-2026-35037: Ech0 affected by unauthenticated SSRF in GetWebsiteTitle allows access to internal services and cloud metadata
- Severity: high (CVSS 7.2 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2026-04-06 · updated 2026-10-24
- Weakness: CWE-918
Description
Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to 4.2.8, the GET /api/website/title endpoint accepts an arbitrary URL via the website_url query parameter and makes a server-side HTTP request to it without any validation of the target host or IP address. The endpoint requires no authentication. An attacker can use this to reach internal network services, cloud metadata endpoints (169.254.169.254), and localhost-bound services, with partial response data exfiltrated via the HTML <title> tag extraction This vulnerability is fixed in 4.2.8.
Affected products
- lin-snow Ech0: before 4.2.8 — fixed in 4.2.8
How to fix
Upgrade to a fixed version: lin-snow Ech0 4.2.8. Check the vendor advisory for mitigations.
References
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